Trimming attachment for machines for uniting knit fabrics.



E. O. DAVIS. TRIMMING ATTACHMENT FOR MACHINES FOR UNITING KNIT'FABRIGS.APPLICATION FILED rm. 17, 1910.

992, 1 1 6. Patented May 9,1911.

UNITED STATES PATENT OFFICE.

EDWIN O. DAVIS, OF PADUGAH KENTUCKY.

TRIMMING- ATTACHMENT FOR MACHINES FOR UNITING KNIT FABRICS.

To all whom it may concern:

Be it known that I, EDWIN O. DAVIS, a citizen of the United States,residing at Paducah, in the county of McCracken and State of Kentucky,have invented certain new and useful Improvements in TrimmingAttachments for Machines for Uniting Knit Fabrics, of which thefollowing is a specification.

My invention relates to improvements in trimming attachments formachines for uniting knit fabrics wherein sewing or looping mechanism iscombined with either an intermittently or continuously revolving ring ofimpaling-pins upon which the adjacent loops of the two portions offabric to be united are carried; and this invention relates particularlyto a trimming attachment for such machines whereby the superfluous orprojecting edges of the fabric are severed at a uniform distance fromthe loops of fabric on the impaling-pins and the ravelings clearedtherefrom preparatory to the sewing or looping operation.

The primary object of the invention is to provide a generally improvedtrimming attachment of this class in which the various parts are soarranged and combined as to more effectively meet the demands of actualservice.

The invention comprises a novel construc tion and arrangement of presserdevice and guide-members whereby the fabric is directed to andmaintained at the base of the impaling-pins; a novel construction andarrangement of cutting-members whereby clean and uniform severance ofthe impaled edges is effected; and a novel construction and arrangementof brushes linked together and operated in such a manner as to beadapted to be alternately advanced and retraoted and having theirintersecting paths of travel in the path of travel of the severed edgesof the fabric on the impaling-pins whereby trimmings and ravelings areeffectively cleared therefrom.

With the above mentioned and other ends in View, the invention consistsin the novel construction, arrangement, and combination of partshereinafter described, illustrated in one of its embodiments in theaccompanying "drawings, and particularly pointed out in the appendedclaims.

Referring to the drawings, forming a part of this specification, Figure1, is a top Specification of Letters Patent.

Application filed February 17, 1910.

Patented May 9, 1911.

Serial No. 544,478.

plan view of the improved attachment applied to a looping machine of thecontinuously and uniformly revolving type. Fig. 2, a top plan view ofthe attachment showing the parts in a position opposite to thatillustrated in Fig. 1. Fig. 3, a plan view of the brush end or portionof the same. Fig. 4, an enlarged top plan view of the same, a portion ofthe linked operating levers and over hanging bearing bracket, beingbroken away for the purpose of clearer illustration of the parts. Fig.5, a side elevation of the improved trimming attachment. Fig. 6, a crosssectional view taken through line az-m of Fig. 4, showing form ofconnection, and adjustment between the base supporting bracket, andvertically movable overhanging bearing bracket carried by the latter.

Similar numerals of reference designate like parts throughout all thefigures of the drawings.

In the accompanying drawings, the improved trimming attachment is shownapplied to a looping machine in which the ring of impaling-pins 1, isadapted to be continuously and uniformly revolved by means of adriving-shaft 2, having a worm gear 3, connected to suitableintermediate gearing beneath the support or dial-plate 4, as shown anddescribed in my application for Letters Patent for improvements in machines for uniting knit fabric, filed April 22, 1909, Serial No.491,511.

The improved trimming attachment comprises a supporting base member orbracket 5, mounted upon the support or dial plate 4, and provided with alaterally extending bearing arm 6.

An over hanging bearing bracket 7, is carried by the supporting basemember 5, and is vertically adjustable thereon by being provided with aguide-way or recess -8, taking over similarly shaped guide-member orflange 9, on the front or face side of said supporting bracket. The overhanging bracket 7 together with its attachments, are adapted to bevertically adjusted by means of an adjusting-bolt 10, loosely mounted inthe base bracket 5, and provided with a flanged screw head, saidadjusting bolt being normally held in position by means of a head 11, ofa screw member impinging upon the flanged portion 10 of the bolt-head10, as shown. It will thus be seen that the bearing bracket 7, isvertically supported and carried upon the threaded end of the adjustingbolt 10, loosely mounted in a plain opening in the bracket 5, normallyheld down by the screw head 11, and extending downwardly into a threadedopening in said bracket as shown most clearly in Fig. 4, of thedrawings, and that by turning said bolt 10, to the right or to the left,said bracket may be moved upwardly or downwardly to give it any verticaladjustment desired.

The over hanging bearing bracket 7 comprises a main body portionterminating in a laterally extending bearingarm 7*, forming a bearing 7and provided with a depending portion 7, said depending portionterminating at its lower end in a second bearing 7 Fabric guide-members12, and 13, are carried by the bearing bracket 7, the guidemember 12,having its lower edge disposed just above the ring of impaling-pins andcurved rearwardly and outwardly in the direction of travel of the ringof impalingpins for the purpose hereinafter explained. The guide member13, is disposed just beneath the impaling-pins, and is vertically andhorizontally adjustable by being supported at one end on a bearingbracket 14, adjustably secured upon the lower end of a depending bearingpin or bar 15, extending downwardly from the end of the main bodyportion of the bracket 7.

The bearing bracket 14, and guide member 13, carried by said bracket 14,are supported and carried by the bearing pin 15, and said members 13 and14, are secured thereon by means of a clamping screw 14 by means ofwhich said members may be given any desired vertical or horizontaladjustment or disposition in an obvious manner. v

The projecting ends of the fabric are adapted to be cut or trimmed bymeans of a pair of coacting cutting members or blades disposed justabove the base portions of the impaling-pins and between the verticalplanes of the guide members 12, and 13, said cutting members beingcarried by and vertically'adjustable on the over hanging bearing bracket7 as now described. A stationary cutting member or blade 16, isremovably mounted in a bearing bracket 17, by means of a clamping blockand screw 18. The bearing bracket 17 in the present instance, is securedat one side of the bearing bracket 7 and vertically adjustable, by meansof a guide-way or recess 19, taking over a guide member 20 formed by oneside of the bracket 7 and a set screw 21 as shown most clearly in Figs.4 and 5 of the drawings. A

second or cooperating cutting member or blade 22, is provided, saidsecond blade being provided with a guide member 22 to maintain the blade22, in proper operative relationship with the cutting member 16, whenreciprocated as hereinafter described. As a means for reciprocating thecutting member 22, and giving it the proper motion with respect to theblade 16, a vertical rock shaft 23, is mounted in the bearings 7 and 7,of the depending portion of the bracket, said rock shaft being providedwith a horizontally extending arm 24, removably carrying the cuttingmember 22, by means of a clamping-bolt 25. By reason of the location ofthe cutting edge of the blade 22, relative to the rock shaft 23, it isobvious that when the latter is oscillated by the means hereinafterdescribed, the cutting edge of the blade 22, will not only be movedtoward the edge of the coacting blade 16, but will be moved rearwardlyin the direction of travel of the fabric to be out or trimmed betweenthe blades. As a means for effectively holding the cutting blade 22, inoperative relationship with the blade 16, a coiled spring 26, isinterposed between the boss portion of the arm 24, and the bearing 7",said coiled spring surrounding the rock shaft 23, as shown. If desired,a bearing sleeve or boss 23, may be provided as shown,

said sleeve or boss being adapted to bear against the lower bearing 7 Asa means for engaging and elevating the superfluous or projectingportions of the fabric which may be disposed flatwise on the ringportion of the impaling-pins in the act of placing the loops of fabricon said impalingpins, a downwardly and forwardly projecting curvedfinger portion 27, is secured upon the fabric guide member 12, saidfinger portion being adapted to take under the superfluous fabric in anobvious manner and elevate the same to rest and travel along the side ofthe guide member 12, until severed by the cutting members of blades,after which it falls down upon the impaling pins and is carried off ofthe pointed ends of the same by reason of the curvature of the guidemember 12.

As a means for effectively clearing the trimmings and ravelings from thesevered edges of the fabric, a pair of reciprocatory brushes 28, and 29,are mounted upon the ends of vertical bearing bars 30, and as a meansfor causing said brushes to be alternately advanced and retracted acrossthe path of travel of the cut fabric, and also'for causing the paths oftravel of the respective brushes to intersect each other in the path oftravel of the fabric, the brush 28, is mounted in a horizontallyswinging bell crank member 31, said brush 28, and bell crank 31, beinglinked to the bearing bar 30,0f the brush 29, by means of a connectinglink 32. It will be observed that the bell crank member 31, is

pivoted upon the laterally extending bearing arm 6, of the stationarybase bracket 5, and hence, in order to permit the brush operating lever33, on the vertically adjustable bearing bracket 7, to be carriedvertically in the adjustments of the bearing bracket 7, the connectinglink 32, is loosely mounted upon the bearing bar 30, of the brush 29, soas to be capable of a sliding or vertical movement on the bar 30, duringthis adjustment.

As a means for reciprocating the brush operating lever 33, on its pivotbearing 3%, a connecting arm 35, is eccentrically mounted at one endupon the driving-shaft 2, and is connected, in the present instance, tothe short end of the operating lever 33, by means of a suitableuniversal or ball and socket bearing 36, below the short end of thelever 33.

As a means for oscillating the rock shaft 23, and reciprocating theattached arm 24, and cutting blade 22, an operating lever 37, is mountedupon the rock shaft 23, the arm of said lever 37, extending from saidrock shaft 23 in an opposite direction to that of the direction oftravel of the ring of impaling-pins, and being linked to the arm of thebrush operating lever 33 by means of a link member 38. By reason of thisconnection the linked operating levers 33, and 38, are simultaneouslyreciprocated through the eccentric connecting arm 35, and the linkedbrushes 28, and 29, and cutting blade 22, are simultaneously operated.

As a means for directing or driving the impaled fabric toward the baseportions of the impaling-pins (in case the fabric is not properly placedon the pins), a depending presser bar or member 39, is secured to theend of the operating lever 37, and provided with a horizontallyextending presser finger portion 39, said presser finger portion beingdisposed beneath said impaling-pins and being adapted to be moved towardthe base portions of said pins when the lever 37, is reciprocated,whereby the presser finger 39, by its contact with the fabric suspendedbelow the impaling-pins, is adapted to direct or drive the fabric towardthe base portions of the impaling-pins, and before being acted upon bythe fabric guide member 13. As a means for clearing the brush 29, oftrimmings or ravelings during the brushing operation, the fabric guidemember 13, is provided at one end with a comb formed by a series ofupwardly extending brush cleaning points or teeth 40, over which thebrush 29, is adapted to pass in its outer point of throw orreciprocation in the brushing operation.

From the foregoing description, taken in connection with theaccompanying drawings, the operation and advantages of my invention willbe readily understood.

Having thus described an embodimentof my invention, what I claim anddesire by Letters Patent is,

1. In a trimming attachment, a ring of impaling-pins and a support, anoverhanging bearing bracket provided with guide members and a stationarycutting member,a vertical rock-shaft provided with an arm carrying acoacting cutting member, a lever secured to said rock-shaft and havingits arm extending from said shaft opposite the direction of travel ofsaid ring of impalingpins, a depending presser bar secured to said leverand provided with a presser finger disposed beneath said impaling-pinsand adapted to be moved toward the base portion thereof when said leveris reciproeated, and means for reciprocating said lever.

2. In a trimmer, a ring of impaling-pins and a support, an overhangingbearing bracket, suitable "rude and cutting members carried thereby,linked brushes adapted to alternately travel across a common path,linked operating levers for simultaneously reciprocating said linkedbrushes and one of said cutting members, a presser member carried by oneof said linked levers and disposed beneath said ring of impaling-pins,and means for reciprocating said operating lovers.

3. In a machine of the class described, a ring of impaling-pins, asupport therefor, a driving shaft, a bearing bracket carried above saidimpaling-pins, guide members arranged in different planes to receivesaid impaling-pins between them, a rock-shaft provided with an arm,coacting cutter members one of which is carried by said arm, linkedbrushes adapted to alternately travel to and from each other and overthe path of travel of the trimmed edges of the impaled fabric, linkedoperating levers one of the arms of which is connected to said linkedbrushes and the other of which is connected to said rock-shaft, adepending rod carried by said last mentioned lever and provided with apresser-finger extending beneath and toward the base of saidimpaling-pins, and an eccentric rod on said driving shaft and connectedto said linked operating levers.

4. A machine of the class described, comprising a ring of impaling-pins,a fixed support therefor, a driving shaft, a supporting base member onsaid fixed support, a bearing bracket adjustably mounted on said basemember and extending across the path of travel of said ring ofimpaling-pins, vertically adjustable fabric guide members carried bysaid bearing bracket, one of said members being horizontally adjustablebe neath said impaling-pins and provided with brush-cleaning points, apair of reciprocatory brushes adapted to traverse the path of travel ofthe cut edges of the fabric on said impaling pins, one of said brushespassing over said brush-cleaning points, linked operating levers on saidbearing bracket one of said levers being operat-ively connected to saidbrushes and the other with a vertical rock-shaft at one end and adepending In testimony whereof I have afiixed my resser-rod on theother, a stationary trim]; signature, in presence of two Witnesses.

min =knife an arm mounted on said roc shaft and irovided With acooperating t-riin- EDWIN DAVIS 5 ming-lmife, and a connecting armeccentrically mounted on said driving shaft and connected to one of saidlinked operating levers.

WVit-nesses:

FRAU BILLMAN, O. C. BILLMAN.

Copies of'this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. O.

